Manuals, parts lists, wiring diagrams for Tempstar HVAC equipment, also some Heil, InterCity & Carrier furnaces.
Free downloadable manuals for Tempstar Air Conditioners, Boilers, Furnaces, Heat Pumps. Here we provide free downloadable copies of Tempstar installation and service manuals for heating, heat pump, and air conditioning equipment, or contact information for the manufacturers who can provide that information for nearly all major brands of HVAC equipment.
We include links to contact information for each manufacturer or producer of Tempstar furnaces and related equipment, parts, and installation, repair, wiring diagrams, manuals.
We include immediate downloads of Tempstar installation & repair manuals and wiring diagrams for air conditioners, heat pumps, and heating equipment from a variety of manufacturers as well as contact information to obtain the exact manual or wiring diagram for your unit.
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Tempstar is a division of International Comfort Products that in turn is a part of UTC Climate, Controls & Security that is a unit of United Technolgies, Inc.
The Tempstar company provides a wide range of HVAC equipment including air conditioners, air scrubbers, ductless or split system A/C, evaporator coils, fan coils, gas furnaces, geothermal equipment, heat pumps, oil furnaces, packaged HVAC systems, and thermostats.
The company provides a dealer locator page but does not give its own company contact information (at least not that we could find in 2020) at its website. However contact information is provided in the company's documents such as the Oil Furnace Warranty (2021) we include below.
Note that some Tempstar HVAC documents, when observed, appear under the ICP or International Comfort Products label, such as the Oil Furnace warranty listed below. In Turn, ICP documents like the furnace warranty will bear the Carrier brand!
Other furnaces sold under the Tempstar brand are actually manufactured by Heil Corporation.
[Click to enlarge any image]
Tempstar HVAC equipment manufacturing date is usually encoded in the serial number
YYWW567890
or in the serial number format
XYYWW56790
(ignore the first alphabetic character, pick up the first four numeric digits, and decode them as YYWW as we illustrate here.
Use the first four numeric digits that form YYWW where YY is year of manufacture and WW is week of manufacture in that year.
The remaining numeric digits, usually 5, form a unique serial numer or manufacturing sequence number of the equipment.
This same manufacturing date encoding appears in most HVAC equipment distributed under the ICP brands of:
Arcoaire, Comfortmaker, Heil, ICP, International Comfort Products, Inter-City Products, Keeprite, Tempstar, and UTC, United Technologies Inc.,
Above: questions about the safety of this Tempstar heater are discussed at CONDENSING GAS FURNACE INSPECTION & TESTS
Above: the Tempstar OLV QuietComfort®87 ow Boy Oil Furnace, described at the Tempstar website, a member of the ICP or International Comfort Products company, whose furnace warranty names the Carrier Corporation, and whose furnace is also sold under the Heil Heating & Cooling Products brand (Screenshot just below, 2021/05/17 taken at https://www.heil-hvac.com/en/us/products/oil-furnaces/87-low-boy-oil-furnace/)
Also see HEIL® Heating & Cooling Products [web page]
[Click to enlarge any image]
Also see the HVAC Manuals at
Some Tempstar furnaces provide a light emitting diode (LED) status code display to aid the installer, service technician, or homeowner while installing or servicing the unit.
The LED code can be seen through the view port in the blower access panel. The company advises:
NOTE: Record the LED status code BEFORE removing the blower access door or turning off 115-v power to the furnace. See the information booklet inside the main furnace door for a service code legend
Tempstar Furnace Error Codes |
||
LED Flash Pattern | Signifies | Action |
Pulsing "heartbeat" or LED on solid |
Safety lockout | Auto reset in 1 hr or Power off-on to reset |
2 flashes | Pressure switch closed | Clear pressure tubing obstruction or replace pressure sensor switch |
3 flashes | Low pressure switch stuck open | Check flue vent for obstruction, Check for clogged condensate drain Check for inadequate gas supply Check for loose switch electrical connections Check for obstructed pressure sensor tubing |
4 flashes | Limit circuit fault | Check for dirty air filter Check for loose switch connections Check for loose blower squirrel cage fan Check for improper gas input setting Check for duct crimp, collapse, obstruction Replace limit switch |
5 flashes | Bad burner flame | Check for gas valve not closing properly Check for gas leaks Check for soot (very dangerous) on burners |
6 flashes | Ignition failure | Check for inadequate gas supply or pressure Check for loose control ground wire connection Check for improper grounding of flame sensor Clean flame sensor for soot or dirt or oxide - clean Check flame sensor position in flame Replace hot surface igniter |
7 flashes | Limit circuit lockout | Auto reset after 3 hours See code 4 |
8 flashes | Gas heat lockout | Gas valve stuck closed |
9 flashes | Medium or high pressure switch failure PSR relay oopen |
see Status code 3 |
10 flashes | Reversed polarity | Check power supply wiring |
Status code 1 & 2 | Blower is on after power-on | Normal condition |
Status code 1 & 4 | Blower motor problem | Blower did not reach 250 rpm Check for bad blower bearings Check blower wiring |
Status code 1 & 5 | Blower motor lockout | Auto reset after 3 hours |
Status code 1 & 6 | Ignition lockout | Auto reset after 3 hours |
Status code 3 & 5 | Gas valve failure | Check wire connections at gas valve (red, orange, yellow wires) |
Status code 4 & 2 | Inducer motor failure | Check for draft problem: wrong vent size, blocked vent Check for bad wiring connection at motor Check for blocked sensor tubing to pressure switch Replace bad inducer motor |
Status code 4 & 3 | Low / medium pressure swith open + medium / high pressure switch closed |
Check low gas inlet pressure Check for blocked vent or water in vent Check for bad wiring connection at switch Check for clogged condensate drain Check for blocked or disconnected pressure sensor tube |
NO LIGHTS & heat is "on" | power is off to the heater |
Check power supply Be sure furnace power switche(s) are ON Check / press the RESET button Watch out: do not keep doing this if the heater doesn't start & keep running |
...
Below you will find questions and answers previously posted on this page at its page bottom reader comment box.
I am in desperate need of some help. Bought a 1990 used tempstar furnace online and no manual no direction on installing properly - M.M. 2023/10/06
- re-posted from private email
Sure I can help. Best would be if you posted your request and a photo of the furnace data tag online at our page - TEMPSTAR HVAC Products - [above on this page]
Reader follow-up:
Yes I need help with that, please. MM
Found above on this page, this manual:
we replied that inspectapedia.com/heat/Tempstar-NU-Service-Manual.pdf should work for you. Take a look at that document. Don't hesitate to post or ask follow up questions
Dan Hi - looking for manual for ICP furnace model t9mpd100j2081. Please help! - 2022/10/08
Wee the ICP MANUALS given by the ICP link at the start of the article above. Your manual is there.
Hello I've got a slight problem with my Tempstar Furnace, (Model NFCP3600A, Serial L9739 36772). Recently there was a lightning strike near the house, about 10 feet away.
Afterwards I noticed it was getting hot in the house even with the AC running. After some investigating I discovered that the lightning strike affected the furnace causing both the heat and the fan to run continuously.
For a temporary fix the heating coils were disconnected to prevent them from working, and the fan is running constantly.
I will eventually need a working heater, and a fan running 24/7 will get expensive so I need to find a solution.
Is there a part that I can find and replace or is this furnace a lost cause that should be replaced now?
- James Moore 2023/07/08
Possibly. A power surge could have fried the control board in your Tempstar furnace. The control board determines when the fan runs as well as other functions.
I'd want an experienced service technician onsite to check the control board and relays in the heater - it may be a simple parts swap-in.
Hello I need help. I am a new home owner and have a family of 10 believe it or not. I have a tempstar furnace and the model number is in the picture with the barcode.
And in the other picture shows my furnace with a wire issue. I bought new dual pressure switches which are in the next photo.
[Click to enlarge any image]
My issue is that I don’t know where to hook up which wire to the blue -1.50 transition switch.
It’s very cold in my house right now and I am using a kerosine heater to keep my little ones warm but I really need to get this fixed ASAP.
I would be very thankful for any advice or a picture of a wiring diagram because I just can’t find one for the model of my furnace.
Can anyone please help? - 2021/12/23 AJ Maxwell
AJ are you seenng an LED flash code on your Tempstar furnace? If so check the table of Tempstar error codes at the bottom of the article above.
Watch out: using a kerosene heater indoors can risk fatal carbon monoxide poisoning.
Be SURE you have working smoke and CO detectors properly located, installed, tested - immediately.
I'm not sure a wiring diagram is going to fix your heater - first you need a confident diagnosis of why you have no heat.
If you haven't already done that you might check the steps given at
You can download and see wiring diagrams and other instructions for your furnace using this link:
TEMPSTAR / KENMORE FURNACE INSTALLATION MANUAL [PDF]
and there find wiring instructions and a wiring diagram.
My tempstar heatpump setting to switch at 34 degrees to aux heat was changed to a higher temp, how do I put it back to 34degrees.
Jim Apking 2021/11/23
If I understand your question correctly (when the heat pump switches to AUX HEAT ) - that is to say, we are NOT talking about switching to "Emergency heat"
then that switch point is set in your thermostat by its manufacturer to automatically call for AUX HEAT when the indoor temperature, as sensed by the thermostat, drops 3 degrees below the temperature you've called for at the thermostat.
E.g. if your thermostat is set to 68 degF the AUX heat will come on if the temp. drops to 65 degF or below. The reason heat pumps work this way is that larger temperature swings (or a too-large night-time setback) are considered inefficient when heating by a heat pump.
It is possible to re-set the AUX HEAT turn-on point to other differences such as sooner (just 1 degF difference - not recommended) or later (e.g. 5 degF difference) but most homeowners will need to call their heating service tech to make that change.
If you're about as net-savvy as I thought I was you'll have a devil of a time finding the manual for at least some Tempstar products at the comopany's website.
You can contact Tempstar by email at https://www.tempstar.com/en/us/contact-us/
The procedure to change the AUX HEAT turn on gap varies by brand and model of your thermostat.
For example if yours is a Nest thermostat, Google says
If Heat Pump Balance is enabled, you don't have to worry about the lockout temperature. Just choose whether you want more comfort or more savings,
and the Nest thermostat will learn to adjust your lockout temperature as needed.
Because AUX heat is so expensive, running the heat pump longer can be cheaper than using AUX heat. Heat Pump Balance can automatically turn the heat on early to reduce AUX heat use as much as possible and get to your target temperature on time.
Heat Pump Balance can turn on the heat up to 5 hours before a scheduled temperature, if necessary.
...
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